Failure Analysis of Slurry Pump Impeller in Chehe Dressing Plant

Zhong, Yan Yu; Wang, Dai Li; Zhu, Xian Wang; Guo, Qiang; Peng, Ling; Liu, Yu; He, Hang Min

doi:10.4028/www.scientific.net/AMR.510.390

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HomeAdvanced Materials ResearchMachinery, Materials Science and Engineering...Failure Analysis of Slurry Pump Impeller in Chehe...

Failure Analysis of Slurry Pump Impeller in Chehe Dressing Plant

Abstract:

Chemical composition and metallographic organization were analyzed for the failure characteristics and main reasons of the imported slurry pump impeller used by Chehe Dressing Plant China Tin Group. A series of larger long strip form carbides found on the metallographic organization, which improving cut apart trend on matrix seriously, was the main reason of the impeller failure. Proper amount of vanadium, titanium and rare earth complex modifier can refine carbides and improve their morphology. The best mortar proportion was identified in the laboratory analysis conditions through the wear experiments.

Info:

Periodical:

Advanced Materials Research (Volume 510)

Main Theme:

Machinery, Materials Science and Engineering Applications, MMSE2012

Edited by:

Quanjie Gao

Pages:

390-394

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.510.390

Citation:

Y. Y. Zhong et al., "Failure Analysis of Slurry Pump Impeller in Chehe Dressing Plant", Advanced Materials Research, Vol. 510, pp. 390-394, 2012

Online since:

April 2012

Authors:

Yan Yu Zhong, Dai Li Wang, Xian Wang Zhu, Qiang Guo, Ling Peng, Yu Liu, Hang Min He

Keywords:

High Chrome White Cast Iron, Impeller, Slurry Pump

Export:

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Price:

$41.00

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References

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[2] REN Fu-zhan, ZHAO Wei-min, WANG Ru, SONG Zhiwu. Influence of Carbide Morphology in High-Chromium Cast on the Mechanical Performance[J]. China Foundry Machinery & Technology, 2007, 2. 23-26.

[3] LIU Zhen, WANG Yong-qiang, GAO Jian-ying. Development and Production of Cr26 High Chromium White Cast Iron[J]. Modern Cast Iron, 2006, 5. 28-32.

[4] WAN Nong, WEI Qi-wu, ZHENG Jian-fang, ZHOU You, WANG Xin-an. Analysis and Countermeasure of Premature Failure of Cr26 High Chromium Cast Iron Cover Plate for Slurry Pump[J]. Heat Treatment of Metal, 2007, 32. 252-254.

[5] PENG Xiao-chun, ZHANG Chang-jun. Microstructure and Properties of 27%Cr High Chromium Cast Irons[J]. Materials for Mechanical Engineering, 2005, 29(11). 35-38.

Paper TitlePages

Improvement of Hardness and Wear Resistance of Steel-Based Surface Composites Fabricated by High-Energy Electron Beam Irradiation

Authors: Duk Hyun Nam, Kyu Hong Lee, Sung Hak Lee

Abstract: The present study is concerned with the improvement of hardness and wear resistance in (Cr3C2,CrB)/carbon steel surface composites fabricated by high-energy electron beam irradiation. Two kinds of powder mixtures, 50Cr3C2-50STS304 and 50CrB-50STS304 (wt.%), were placed on a plain carbon steel substrate, which was then irradiated with electron beam. The surface composite layer of 1.0~1.3 mm in thickness was successfully formed without defects, and contained a large amount (up to 58 vol.%) of Cr7C3 or Cr1.65Fe0.35B0.9 particles in the austenite or martensite matrix. The hardness and wear resistance of the surface composites were 2~3 times higher than those of the steel substrate according to hard particles. Particularly, the surface composite fabricated with CrB powders showed excellent wear resistance because selective wear of the matrix was considerably reduced.

637

Microstructure and Mechanical Properties of 0.63C-12.7Cr Martensitic Stainless Steel during Various Tempering Treatments

Authors: Yu Li Lin, Chih Chung Lin, Tsung Hsien Tsai, Hong Jen Lai

Abstract: In this study, the microstructure and mechanical properties of 0.63C-12.7Cr martensitic stainless steel during various tempering treatments were investigated. Experimental results demonstrate that finely distributed primary carbides can be observed in 0.63C-12.7Cr martensitic stainless steel. It was also found that the measured hardness of 0.63C-12.7Cr martensitic stainless steel after 300°C tempered treatment for 60 minutes can still reach to 677Hv. The variation of measured hardness was found not significant during tempering treatments (200°C-500°C). Moreover, owing to lower concentration of C and Cr, the matensitic transformation temperature Ms can be increased to 96.4°C comparing to -127°C of SUS440C materials.

274

Effects of Carbon Concentration Variation on Primary Austenite Stability of High Chromium Cast Iron

Authors: You Ping Ma, Xiu Lan Li, Lei Yang

Abstract: The effect of carbon content on primary austenite stability of high chromium white cast iron(15.0wt.%) was investigated by means of optical microscopy(OM) and energy spectrum spectrometry(EDS).The results indicate that with increasing the concentration of carbon,the carbon of solid solution in the primary austenite increased, while the chromium was on the contrary, The increase of carbon content stabilized primary austenite under the condition that no secondary carbides precipitated, however, once secondary carbides precipitated, the stability of primary austenite deteriorated with the increase of carbon contents. 2.63wt.% C was the critical value of the secondary carbides precipitation in high chromium white cast iron(15.0wt.%).

1684

Effect of Pouring Temperature on the Microstructure of HCCI/Steel Composite Hammer

Authors: Ning Wei, Kai Wang, Xiang Kui Zhou, Qiang Wang, Qiang Liu, Ji Cheng He

Abstract: The hypereutectic HCCI/plain carbon steel bimetal composite hammer which has metallurgical combination layer were prepared by bimetal liquid casting method and the influence of the pouring temperatures on the microstructure of the hypereutectic HCCI and the combination layer were studied. The results show that lower pouring temperature was not benefit for refinement of primary carbide and formation of metallurgical combination layer. A bad metallurgical combination layer between two metals which were mixed along the interface exhibited at higher pouring temperature.

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